Amorphous and microcrystalline silicon p-i-n optical speed sensors based on the flying spot technique
- Citation:
- b Vieira, M.a, Fantoni Koynov Cruz Maçarico Martins A. a S. a. "Amorphous and microcrystalline silicon p-i-n optical speed sensors based on the flying spot technique." Journal of Non-Crystalline Solids. 198-200 (1996): 1193-1197.
Abstract:
From the flying spot technique (FST) the ambipolar diffusion length and the effective-lifetime of the carriers photogenerated by a moving light spot that strikes a p-i-n junction can be inferred. In this paper, those properties of a p-i-n junction are used together with an optical triangulation principle to determine the velocity of an object that is moving in the direction of a light source. The light reflected back from the object is analysed through an amorphous or a microcrystalline p-i-n structure. Its transient transverse photovoltage is dependent on the velocity of the object. A comparison between the performances of both kinds of devices is presented.
Notes:
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